as is the case with the Methuselah Tree, a bristlecone pine more than 46 centuries old. But it's truly baffling to learn under what conditions it has accomplished this extraordinary feat.

Few know where the oldest tree in the world is – the Forest Service doesn't reveal the exact location to protect it. Here's ...

making a four-mile loop through the Methuselah Grove, where the dendrochronologist Edmund Schulman established the age of several extremely old trees back in the 1950s. The oldest known is the ...